lendhelper

straightforward way to track and organize loans/debts/IOUs between two people.

share costs with someone, for example, split rent and bills with housemates

features:
- see who owes who
- easy to use
- record debts quickly
- settle up whenever
- categorize debts
- currency exchange with live rates
- support for >150 currencies
- free forever
- share with the other person
- no confusing group options

EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/